A Houthi Shiite rebel poses for a picture as he guards a street in Sanaa, Yemen. Yemenís embattled President Abed Rabbo Mansour Hadi rushed to reach a cease-fire with the countryís most potent Houthi rebels after hours of gunbattles and firing of mortar shells in heavy clashes near Yemenís presidential palace Monday, Jan. 19, 2015. Photo: Hani

Anonymous hackers behind the @OpLastResort twitter account have hacked U.K. and Chinese government websites in response to the nine-hour detention of Brazilian national David Miranda, partner of Guardian journalist Glenn Greenwald, at London’s Heathrow Airport.
Miranda was held by British authorities under a counterterrorism law after visiting

Hackers, researchers and security experts are desperately trying to determine the source of a piece of malware that, using vulnerability in the Firefox browser, identified users of the private Tor network.
The Tor network is comprised of a number of proxy nodes through which a user’s connection is routed, creating randomly generated private